Hi and welcome.
Sounds like you could have an infection.
If you think you may be infected then please start here and follow the instructions.
NEW INSTRUCTIONS - Read This Before Posting For Malware Removal Help - Tech Support Forum
Do not post your logs back in this thread - follow the guidance in the above link!
If you have problems with any of the steps, simply move on to the next one and make a note of the problem in your reply.
Please note that the Security Forum is always busy, so I would ask for your patience while waiting for a reply - it may take a few days.